diff --git a/qq2clone b/qq2clone
index 6b6e9f1..d9d2079 100755
--- a/qq2clone
+++ b/qq2clone
@@ -2222,14 +2222,12 @@ convert_to_seq ()
 # PARAMETERS: $1: A set
 #=========================================================================#
 {
-local s="$1"
-
 { [[ "$1" =~ ^[,-] ]] || [[ "$1" =~ [,-'^']$ ]] ||
   [[ "$1" =~ [,-][,-] ]] || [[ "$1" =~ [[:space:]] ]] ||
   [[ "$1" =~ ^.(.*[^',']\^) ]]; } && return 1
 
 declare -a parts
-IFS="," read -ra parts <<<"$s"
+IFS="," read -ra parts <<<"$1"
 local states i p not LH RH minus plus
 states="$(list_states| tr " " "|")"